I have a problem that has just started happening on my imac 27. It's about a year old and has been reasonably trouble free. In the last day or so I have been experiencing problems downloading files. It started with iTunes - it would get so far and then stop with an error of 3527, Now when I try to download large files (195mb or so) it will stop about half way and when I try and restart go back to zero and start again.
I have checked my connection and that appears fine with a fast upload/download speed
I am running Lion 10.7.3 and have about 500mb of free space.
I have run disk verification on the disk utilities and checked file links - all appears fine